An object of S3 class "PanelSurv".
- psDF
a data frame, part of original input data frame with variable
"ID", "time" and "count".
- timeGrid
ordered distinct observation times in the set of all
observation times.
- panelMatrix
a matrix representation of panel count data, one
row per subject, one column per time point in "timeGrid".
In the case of is.PanelSurv, a logical value TRUE if
x inherits from class "PanelSurv", otherwise an FALSE.
In the case of plot.PanelSurv, a tile plot of
panelMatrix produced by package ggplot2 with color
indicating number of counts since last observation time.